Have you think about your computer's memory is not enough? Do you want to expand it? If you do, this post will be very helpful for you.
Transcend's USB Flash Modules(Vertical) is very convenient, easy to expand our computer's momory. You connnect it to the computer and install some driver, that's okay.
For its spec part, DC 5V Op.Voltage 10,000 insertion/removal cycles durability.
4 choices, 512MB, 1,2,4GB as you like.